Redirect wordpress uploads folder to s3 bucket using .htaccess
There are a couple of problems. You need to put the rule ABOVE your wordpress rule because wordpress rules route every request to index.php.Next you will need to use mod_proxy with the use of the [P] flag because regardless of not specifying redirect in the rewriterule, Apache will do it anyway because the substitution URL is a new domain. So Apache will perform a Redirect. So using [P] flag should proxy the content instead of doing a redirect. This should accomplish what you need.
RewriteEngine OnRewriteRule ^wp-content/uploads/(.*)$ https://BUCKET.s3.amazonaws.com/wp-content/uploads/$1 [P]# BEGIN WordPress<IfModule mod_rewrite.c>RewriteEngine OnRewriteBase /RewriteRule ^index\.php$ - [L]RewriteCond %{REQUEST_FILENAME} !-fRewriteCond %{REQUEST_FILENAME} !-dRewriteRule . /index.php [L]</IfModule># END WordPress